340 cylinder honing question

I acquired my 340 35 year's ago with motor work just having been completed. It's been used lightly of course over the years with no major work having been done since. Compression is 165-175 across the board. I've noticed that my cylinders are absolutely smooth, what does this signify since there is no cross hatch in the bores, is this normal, special rings perhaps?
Just joined and this is my first post, happy to be here!
Thanks for any help.